1983 20¢ Science and Industry stamp
September 20, 1848

American Association for the Advancement of Science

The American Association for the Advancement of Science (AAAS) was founded on September 20, 1848, in Philadelphia, Pennsylvania. It grew to become the world’s largest general scientific society with more than 120,000 members.

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1947 3c Thomas A. Edison stamp
September 4, 1882

Start of the Electrical Age 

On September 4, 1882, Thomas Edison began providing electricity to a portion of New York City, an event often considered the start of the electrical age.

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1998 32¢ Celebrate the Century - 1920s: Radio-America stamp
August 20, 1920

Early Commercial Radio

On August 20, 1920, Detroit’s 8MK radio station began daily broadcasts. Still in operation today, the station often claims to be the first commercial radio station, though a few others have also staked their claim on that title.

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1918 24c Curtiss Jenny stamp
August 12, 1918

U.S. Post Offices Takes Over Airmail Flights

On August 12, 1918, the US Post Office Department took over control of airmail service from the US Army Air Service. Under the Post Office Department, the service flourished, leading to transcontinental airmail service, which was eventually taken over by private companies.

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2000 World Wide Web stamp
August 6, 1991

The World Wide Web

On August 6, 1991, Tim Berners-Lee published the first-ever website, heralding the start of the world wide web. The web has grown to over 1.8 billion websites today, and continues to grow every day.

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1996 Dickson stamp
August 3, 1860

Birth of William Dickson

Inventor William Kennedy-Laurie Dickson was born on August 3, 1860, in Le Minihic-sur-Rance, Brittany, France. Dickson helped invent the Kinetoscope and Mutoscope, early steppingstones in the motion picture industry.

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1995 Winton automobile stamp
July 28, 1897

Winton Auto Test-Drive

On July 28, 1897, Alexander Winton began a nine-day test-drive of his automobile, proving its reliability to investors.  Winton went on to become the top-selling automobile manufacturer for several years.  He had more than 100 patents, and often allowed others to use them for free when safety was involved.

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1989 $2.40 Moon Landing stamp
July 20, 1969

U.S. Lands First Men On The Moon

On July 20, 1969, the US effectively won the Space Race when Neil Armstrong and Buzz Aldrin landed the Eagle lunar module on the Moon’s surface.  

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1955 Soo Locks Centennial stamp
June 18, 1855

The Soo Locks

On June 18, 1855, the first ship passed through the Soo Locks, located on the St. Mary’s River between Lake Superior and Lake Huron. Today there are four locks, and an average of 10,000 ships pass through them each year.

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